function show (id) {
	if (document.getElementById(id))
		document.getElementById(id).style.display = "block";
}

function hide (id) {
	if (document.getElementById(id))
		document.getElementById(id).style.display = "none";
}
function showSub (x, y) {
	var hoofditem = x + "";
	var subitem = y + "";
	for (i = 1; i > 0; i++) {
		var productElement = document.getElementById("sub" + hoofditem + "_" + i);
		if (productElement != null){
			document.getElementById("sub" + hoofditem + "_" + i).display="none";
			if (i == y){
				show ("sub" + hoofditem + "_" + i);
			} else{
				hide ("sub" + hoofditem + "_" + i);
			}
		}else{
			i = -1;
		}
	}
}
function showMenu (x) {
	var hoofditem = x + "";
	for (i = 1; i > 0; i++) {
		var productElement = document.getElementById("sub" + i);
		if (productElement != null){
			if (i == x){
				for (y = 1; y > 0; y++) {
					var productElement2 = document.getElementById("sub" + i + "_" + y);
						if (productElement2 != null){
							hide ("sub" + i + "_" + y);
						}else{
						y = -1;
						}
				}
					show ("sub" + i);
			} else{
				for (y = 1; y > 0; y++) {
					var productElement2 = document.getElementById("sub" + i + "_" + y);
						if (productElement2 != null){
							hide ("sub" + i + "_" + y);
						}else{
						y = -1;
						}
				}
				hide ("sub" + i);
			}
		}else{
			i = -1;
		}
	}
}

var lastSub2;
function showsub2(name)
{
	clearsubs();
	if (name == lastSub2)
       {
         document.getElementById(name).style.display = 'none';
		 //document.getElementById(name+'knop').className = 'kopSelect';
		 lastSub2 = '';
       }
      else
       {
         document.getElementById(name).style.display = 'block';
		 //document.getElementById(name+'knop').className = 'kopActive';
		 lastSub2 = name;
       } 
	//document.getElementById(name).style.display = 'block';
	//lastSub = name;
	location.hash = 'anchor_' + name;
}

function clearsubs()
{
	if (lastSub2) {
		document.getElementById(lastSub2).style.display = 'none';
		//document.getElementById(lastSub+'knop').className = 'kopSelect';
	}
}